Veterinary Medicine

Dairy Production Medicine by Carlos Risco, Pedro Melendez

By Carlos Risco, Pedro Melendez

This accomplished e-book integrates new expertise and ideas which have been constructed lately to regulate dairy farms in a ecocnomic demeanour. The method of the construction of farm animals and caliber milk is multidisciplinary, related to meals, replica, scientific medication, genetics, pathology, epidemiology, human source administration and economics. The ebook is based by way of the construction cycle of the dairy cow protecting serious issues in cow administration. Written and edited by way of hugely revered specialists, this booklet offers a completely glossy and updated source for all these excited by the dairy undefined.

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In many situations, producers opt for a single diet for all lactating cows, and this can be justifiable when production is very high because in such herds even the cows with advanced lactation still maintain high milk production. The assumption in this case is that DMI will vary according to the level of production to accommodate the differences in nutrient needs, and the diet is formulated to not hinder production of the higher-producing cows. In practical terms, the diet is typically formulated to provide sufficient NDF to maintain rumen health and avoid acidosis, at the same time that intake of calories, metabolizable protein (MP), minerals, and vitamins is compatible with yields of milk and milk components of the more productive cows in the group.

After it has been determined that there is enough room for the calf to be delivered per vaginam, the cow is cast in (preferably) right lateral recumbency. This (1) allows the hind legs of the dam to angle forward, which enlarges the operative diameter of the pelvis; (2) lets the heifer slightly spread her legs and stretch the cartilaginous symphysis pubis; (3) aids the calf in coming through the birth canal in a plane parallel to the ground, versus having to rise from the bottom of the abdomen—against the force of gravity—to enter the pelvic inlet; (4) virtually all cows go down during the second stage of parturition, hence it is better to cast them in a preselected location with sufficient room behind the cow to assist her.

Digestive disorders included left displaced abomasum, indigestion, reduced feed intake, traumatic gastritis, acidosis, and bloat. Walking activity was generally lower among sick cows, and daily milk yields of sick cows were approximately 15 kg/day less than milk yields of healthy cows. Milk yields started to drop in affected cows 5–7 days prior to disorder diagnosis. Results from this study indicate that changes in walking activity and daily milk yield are useful tools to detect transition cow disorders early in the disease process.

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